Find the radius of a semicircle if it's perimeter is 18
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The perimeter of a semicircle is =
> (Pi)r+2r where r is the radius of the semicircle.
› Here, r[(Pi) + 2] = 18, or
r = 18/[(Pi) + 2]
Or r = 3.5
> (Pi)r+2r where r is the radius of the semicircle.
› Here, r[(Pi) + 2] = 18, or
r = 18/[(Pi) + 2]
Or r = 3.5
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